Vacuum tank



Dc. 30, v 1924. 1,521,423

A. F. BOYLAN VACUUM TANK Filed Dec. 1922 2 Sheets-Sheet 1 A. F. BOYLANDec. 30, 1924.

VACUUM TANK Filed Dec. 1922 2 Sheets-Sheet 2 II) dllllllliis PatentedDec. 38,

UNITED STATES AARON F. B'OYLAN, 0F DENISON, IOWA,

VACUUM TANK.

Application filed December 29, 1922. Serial No. 609,649.

To all whom 2'25 may concern Be it known that I, AARON F. BOYLAN, acitizen of the United States, residing at Denison, in the county ofCrawford and State of Iowa, have invented a new and useful Vacuum Tank,of which the tollowing is a specification.

This invention aims to provide a novel form of magnetic means forcontrolling the valves in a vacuum tank in the reserve fuel supplysystem of an internal combustion engine.

It is within the province of the disclosure to improve generally and toenhance the utility of devices of that type to which the inventionappertains.

\Vith the above and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that, within the scope ofwhat is claimed, changes in the precise embodiment of the inventionshown can be made without departing from the spirit of the invention.

In the accompanying drawings:

Figure 1 shows in section, a device constructed in accordance with theinvention, parts appearing in elevation; Figure 2 is a transversesection taken in a plane above the magnet; Figures 3 and 4 aretragmental longitudinal sections, taken through the top of the device,looking in opposite directions.

The numeral 1 denotes a main tank provided at its lower end with avalvecontrolled outlet leading to the carburetor (not shown) of aninternal combustion engine. Atits top, the main tank 1 has an inwardlyextended flange 3. An auxiliary tank 4 is located within the main tank 1and has an outwardly extended flange 5 overlapping the flange 3 of thetank 1. The tank 4: is provided at its lower end with an outlet 10discharging into the main tank 1 and under the control of a flap valve11. A guide 12 is located in the bottom of the auxiliary tank 4. A lid 6is superposed on the flange 5 of the tank 41 and is held in place bysecuring elements 7 engaging the lid and the flanges 3 and 5. A fuelinlet 8 communicating with the main supply tank (not shown) enters thelid 6 and discharges into the auxiliary tank 1. The lid 6 carries theclosure plug 9 giving access to the tank'- 4twhen it is desired to fillthe tank by hand. The suction conduit is marked by the numeral 14 and ismounted in the lid 6, there being a seat 15, in the lid, at the innerend of the conduit. The vent is marked by the numeral 16 and is carriedby the lid 6, there being a seat 17 in the lid, at themner end of thevent. The lid 6 has a pas sage 18 communicating with the vent andpermitting the liquid to flow from the tank 1 at atmospheric pressure,there being openings 19 in the flanges 3 and 5 which register with thepassage 18. The vent 16 is controlled by a downwardly closing valve 20cooperating with the seat 17. The suction conduit 14 is controlled by anupwardly closing valve 21 coacting with the seat 15. I

Hangers 22 depend from the lid 6. Clamp bars 23 are held on the hangers22 by nuts 24-. A magnet 25 is located in the upperend of the auxiliarytank 41- and extends transversely thereof, the magnet 25 being grippedbetween the clamp bars 26 and although the magnet 25 has been shown inthe form of a permanent horseshoe magnet, this form of magnet is notnecessary. a magnet may be used. The arms of the magnet 25 are connectedby a keeper 26.

A vertically swinging bell crank lever 27 is fulcrumed at 28 on a lug 29extended downwardly from the lid 6, the bell crank lever comprising anupper arm 30 and a lower arm 31. The valves 20 and 21 are looselyinterengaged with the upper arm 30 of the bell crank lever 27. Anarmature 32 is mounted on the upper arm 30 of the bell crank lever 27and operates between the side portions of the magnet 25, the armaturehaving upper flanges 33 and lower flanges 3 1 overlapping the side armsof the magnet 25. The lower arm 31 of the bell crank lever 27 is pivotedat 35 in any suitable way, to a support or rod 36 slidable in the guide12. The rod 36 has an upper stop 37 and a lower stop 38. A float 39 islocated in the auxiliary tank 4: and is mounted for reciprocation on therod 36 between the stops 37 and 38.

The operation of a vacuum tank in a de vice of the class described iswell understood by those skilled in theart and the operation may beconfined to those elements of the device which possess patentablenovelty.

In; Figure 1 the valve 21. is in cpen position and; the valve 20 isclosed position.

Any kind of- If thereeis enoughgliquid in the tankl, the float39'Wi'll'be raised off the stop-'38, but the valve 21 Will not closeresponsive to thesuction' in the conduit 14, because-the:bellecrank-rlever 27 is held in the position of Flgure 1 j tank l, the float 39raises, strikes the stop 37, raises the rod" 86 and tilts the bell cranklever 27 until the valve 21 is closed and the valve opened. The tank 4is vented and liquid flows from the tank l into the tank 1 by way ottheoutlet 10. As the level ofthe liquid in the tank at falls, the float89.1noves' down'wardlyraway fronrthe stop 37, but the valve 21.1'emainsclosed and the valve 20 remains open, because the upper arm of the bellicrank 27 has raised the armature 82, thereby breaking the attractionbetween the magnet and the' upper flanges 33' of the armature, andrendering" the lower flanges 3tofthe armature responsive to the actionof the magnet. Ultimately, the descending float 39 strikes the stopBS,moves the rod 36 downwardly, and restores the parts to the positionsof'Figure. 1.. m V I r The advantages ot'the device shown and described"arise mainly outv ofit-lie fact that the valves are controlled withoutresorting tosprings or knuckle joints as is common in r thearrt. o 7 HWhat IS claimed '1s:.

In a" fuel supply system for mime-m1 combustion engine, avacuum tankhaving a suction condult and-a vent, a magnet-1n the tank, a bell cranklever fulcrumedin the tank and comprising upper. and lower 1 turecarried by the lever and responsive to the magnet, the distance betweenthe-arma' ture and. the fulcrum of the lever being 'mav terially greaterthan. thedistance between the fulcrum and the pointof connectionbetweenthe 'fioat and theilo'wer arm of" the lever, said lower arm. slanting"ClOWIDVEi-Idly and inwardly, andl'the upperarm being disposedsubstantially at right angles to'thef axis of the tank.

In testimony that I claim the foregoing as my own, Ihave hereto afiikedmy signature in the presence oftwo witnesses, l

I AARON F. BOYLAN. Witnesses: v g V GEORGE STALEY BART HIc nY.

